Vehicle ventilation control system - has offset pipes with cranked sliding valve plate providing variable flow cross=section

摘要

The air ventilation feed pipe has a first part joining onto the fresh air intake and a second part leading to the vehicle interior. The parts are offset to each other and have an equal rectangular cross section. The offset section contains a sliding control valve (5) which is bent at an angle corresponding to that of the offset part (4). The valve slides along the lower part of the first section and along the base of the second section. The slide valve bent surface (7) is able to provide an infinitely variable cross section alterations between the two parts. The first part is provided with an opening (6) to allow the air to escape when the slide is completely closed.